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PC won't post after CPU upgrade

giusha
By giusha
in Troubleshooting
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Hello,

so recently i tried to replace my 2700x with 3700x on rog strix b450-f gaming board, before trying this i updated my bios to latest version cuz i haven't updated bios since i bought this board 2 years ago, with 2700x everything works just fine but after installing 3700x pc won't post, it gives me yellow led which indicates dram problem, i have 2 sticks of 8gb 3200mhz ram and tried rearranging in every position , tried to put only single stick in every position as well(tried both of them), tried resetting cmos both by removing battery and putting it back in and by short circuiting special cmos pins that board has, tried reinserting cpu as well just in case it wasn't inserted properly, after all that i reinserted my 2700x and it booted right away, could this be because of bios update? i also don't have usb drive that i could format to fat32 and had to update bios via internet so cant even go back to other versions. any help would be appreciated.

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Posted
2 minutes ago, giusha said:

Hello,

so recently i tried to replace my 2700x with 3700x on rog strix b450-f gaming board, before trying this i updated my bios to latest version cuz i haven't updated bios since i bought this board 2 years ago, with 2700x everything works just fine but after installing 3700x pc won't post, it gives me yellow led which indicates dram problem, i have 2 sticks of 8gb 3200mhz ram and tried rearranging in every position , tried to put only single stick in every position as well(tried both of them), tried resetting cmos both by removing battery and putting it back in and by short circuiting special cmos pins that board has, tried reinserting cpu as well just in case it wasn't inserted properly, after all that i reinserted my 2700x and it booted right away, could this be because of bios update? i also don't have usb drive that i could format to fat32 and had to update bios via internet so cant even go back to other versions. any help would be appreciated.

After a CPU upgrade your PC will do RAM training. Just let it sit there for awhile. 

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Posted (edited)

If you can still enter BIOS, try to update your BIOS to the latest version

3700X can be supported if the BIOS version is at least 2301

 

Edit:
Adding reference from ASUS ROG website

image.png.93f58bcd371b71a63bf2521144daa7c3.png

Edited by ImWilly
Adding inference

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Just now, billorwill said:

After a CPU upgrade your PC will do RAM training. Just let it sit there for awhile. 

how long should that take approximately? i did leave it for about 10 minutes first time i tried to boot.

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Just now, ImWilly said:

If you can still enter BIOS, try to update your BIOS to the latest version

3700X can be supported if the BIOS version is at least 2301

bios is version 4007, latest one this board supports.

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4 minutes ago, giusha said:

how long should that take approximately? i did leave it for about 10 minutes first time i tried to boot.

It can take awhile. Longer then 10 minutes. Just give it time 

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9 minutes ago, giusha said:

bios is version 4007, latest one this board supports.

I see, the good news is that there are newer version

I share the link below for you to check it out while waiting for the RAM training

https://rog.asus.com/motherboards/rog-strix/rog-strix-b450-f-gaming-model/helpdesk_bios/

image.thumb.png.5eee67ad3573ffb321d3d04022fc1f92.png

 

Hope this could help

My System: Ryzen 7800X3D // Gigabyte B650 AORUS ELITE AX // 32GB 6000MHz DDR5 Silicon Power Zenith CL30 // Sapphire Pulse AMD Radeon RX 7900 XT OC with mod heatsink on the metal plate  // Phanteks P300A  // Gigabyte Aorus GEN4 7300 PCIE 4.0 NVME // Kingston NV2 Gen4 PCIE 4.0 NVME // 

Seasonic Focus GX-850 Fully Modular // Thermalright Frost Spirit 140 Black V3 // Phanteks M25 140mm // Display: Bezel 32MD845 V2 QHD // Keychron K8 Pro (Mod: Gateron black box ink; Tape mode on PCB and Keycaps) // Razer Cobra Wired Mouse // Audio Technica M50X Headphone // Sennheiser HD 650 // Genius SP-HF180 USB Speaker //

 

And Laptop Acer Nitro 5 AN515-45 for mobility

Phone:

iPhone 11 (with battery replaced instead of buying new phone for long term and not submitting (fully) to Apple Lord

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Posted

It should not take 10 minutes on a Zen 2.

The CPU was used? Working on a different system? Bent pins?

M.S.C.E. (M.Sc. Computer Engineering), IT specialist in a hospital, 30+ years of gaming, 20+ years of computer enthusiasm, Geek, Trekkie, anime fan

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Posted

I forgot a useful test.

Remove rams.

Power on PC.

If beeper is present, shoud "cry" a lot for lacking ram.

Not English-speaking person, sorry, I'll make mistakes. If you're kind, maybe you'll be able to understand.

If you're really kind, you'll nicely point that out so I will learn more about write in good English.  🙂

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Posted
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Just now, 191x7 said:

It should not take 10 minutes on a Zen 2.

The CPU was used? Working on a different system? Bent pins?

no bent pins if i didnt miss any, and yes it was working just fine on friends pc.

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Just now, mMontana said:

I forgot a useful test.

Remove rams.

Power on PC.

If beeper is present, shoud "cry" a lot for lacking ram.

i did try without ram but no beeping did the same just yellow light.

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Posted (edited)
15 minutes ago, giusha said:

i did try without ram but no beeping did the same just yellow light.

 

1 hour ago, mMontana said:

If beeper is present, shoud "cry" a lot for lacking ram.

It's been a while since I've seen a motherboard with a buzzer.

(I just bought one buzzer for my mb, it's actually not bad ! too loud but usefull)

H536d7736dd524b2fbd6f148454520c7fL.jpg

Edited by leclod

I'm willing to swim against the current.

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